<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col><el-button type="primary">添加角色</el-button></el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border="" stripe="">
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable="" @close="removeRightById(scope.row, item1.id)" >{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级权限 和三级权限-->
              <el-col :span="19">
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag type="success" closable="" @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini"
              >编辑</el-button
            >
            <el-button type="danger" icon="el-icon-delete" size="mini"
              >删除</el-button
            >
            <el-button type="warning" icon="el-icon-setting" size="mini"
              @click="showSetRightDialog(scope.row)">分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->

<el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed">
  <!-- 树列表控件 -->
  <el-tree :data="rightsList" :props="treeProps"
   show-checkbox node-key="id" default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer" >
    <el-button @click="setRightDialogVisible= false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      rolesList: [],
    //   控制分配权限对话框的显示与隐藏
    setRightDialogVisible: false,
    // 权限数据列表
    rightsList: [],
    treeProps: {
        label: 'authName',
        children: 'children'
    },
    // 默认选中的节点id数组值
       defkeys: [],
    //    当前即将分配权限角色的ID
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
      console.log(this.rolesList)
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(error => {
        return error
      })
      if (confirmResult !== 'confirm') {
        return this.$message.info(' 已取消删除')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      role.children = res.data
    },
   async showSetRightDialog(role) {
       this.roleId = role.id
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
        }
        this.rightsList = res.data
        console.log(this.rightsList)
        // 递归获取三级节点的id
        this.getLeafKeys(role, this.defkeys)
  this.setRightDialogVisible = true
    },
    // 通过递归的形式获取角色下所有的三级权限的id，并且保存到defkeys中
    getLeafKeys (node, arr) {
        // 如果当前节点不包含children属性，则是三级权限
    if (!node.children) {
        return arr.push(node.id)
        }
        node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框关闭事件
    setRightDialogClosed () {
    this.defkeys = []
    },
   async allotRights() {
     const keys = [
      ...this.$refs.treeRef.getCheckedKeys(),
      ...this.$refs.treeRef.getHalfCheckedKeys()
     ]
     const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>
<style lang="less" scoped>
.el-tag {
  margin: 8px;
}
.bdtop {
  border: 1px solid #eee;
}
.bdbottom {
  border: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
